MC78FC30HT1 [ONSEMI]
Micropower Voltage Regulator; 微功率稳压器
| 型号： | MC78FC30HT1 |
| 厂家： | 
ONSEMI |
| 描述： | Micropower Voltage Regulator |
| 文件： | 总8页 (文件大小：58K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ON Semiconductort
MC78FC00
Series
Micropower Voltage
Regulator
The MC78FC00 series voltage regulators are specifically designed
for use as a power source for video instruments, handheld
communication equipment, and battery powered equipment.
MICROPOWER ULTRA–LOW
QUIESCENT CURRENT
The MC78FC00 series voltage regulator ICs feature a high accuracy
output voltage and ultra–low quiescent current. Each device contains a
voltage reference unit, an error amplifier, a driver transistor, and
resistors for setting output voltage, and a current limit circuit. These
devices are available in SOT–89 surface mount packages, and allow
construction of an efficient, constant voltage power supply circuit.
VOLTAGE REGULATORS
SEMICONDUCTOR
TECHNICAL DATA
MC78FC00 Series Features:
TAB
• Ultra–Low Quiescent Current of 1.1 µA Typical
• Ultra–Low Dropout Voltage (100 mV at 10 mA)
• Large Output Current (up to 120 mA)
• Excellent Line Regulation (0.1%)
• Wide Operating Voltage Range (2.0 V to 10 V)
• High Accuracy Output Voltage (±2.5%)
• Wide Output Voltage Range (2.0 V to 6.0 V)
• Surface Mount Package (SOT–89)
1
H SUFFIX
PLASTIC PACKAGE
CASE 1213
(SOT–89)
PIN CONNECTIONS
1
2
3
Ground
Input
ORDERING INFORMATION
Tab
Output
Voltage
Operating
Temperature Range
(Tab is connected
to Pin 2)
Device
Package
Output
MC78FC30HT1
MC78FC33HT1
MC78FC40HT1
MC78FC50HT1
3.0
3.3
4.0
5.0
(Top View)
T = –30° to +80°C
A
SOT–89
Other voltages from 2.0 to 6.0 V, in 0.1 V increments, are available upon request.
Consult factory for information.
Standard Application
Input
Output
3
2
Representative Block Diagram
MC78FCXX
2
3
C
in
C
O
1
V
in
V
O
V
ref
1
Gnd
This device contains 11 active transistors.
Semiconductor Components Industries, LLC, 2001
1
Publication Order Number:
April, 2001 – Rev. 2
MC78FC00/D
MC78FC00 Series
MAXIMUM RATINGS (T = 25°C, unless otherwise noted.)
C
Rating
Symbol
Value
Unit
Input Voltage
V
CC
10
Vdc
Power Dissipation and Thermal Characteristics
Maximum Power Dissipation
Case 1213 (SOT–89) H Suffix
Thermal Resistance, Junction–to–Ambient
P
300
333
mW
°C/W
D
R
θ
JA
J
Operating Junction Temperature
Operating Ambient Temperature
Storage Temperature Range
T
125
°C
°C
°C
T
A
–30 to +80
–40 to +125
T
stg
NOTE: ESD data available upon request.
ELECTRICAL CHARACTERISTICS (V = V + 1.0 V, I = 10 mA, T = 25°C [Note 1], unless otherwise noted.)
in
O
O
J
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage
30HT1 Suffix (V = 5.0 V)
V
O
V
2.925
3.218
3.900
4.875
3.0
3.3
4.0
5.0
3.075
3.382
4.100
5.125
in
33HT1 Suffix (V = 6.0 V)
in
40HT1 Suffix (V = 7.0 V)
in
50HT1 Suffix (V = 8.0 V)
in
Line Regulation
Reg
–
0.1
–
mV
mV
mA
line
V
in
= [V + 1.0] V to 10 V, I = 10 mA
O O
Load Regulation
= [V + 1.0], I = 1.0 to 10 mA
Reg
–
40
80
load
V
in
O
O
Output Current
30HT1 Suffix (V = 5.0 V)
33HT1 Suffix (V = 6.0 V)
40HT1 Suffix (V = 7.0 V)
50HT1 Suffix (V = 8.0 V)
I
O
50
65
65
80
80
–
–
–
–
in
100
100
120
in
in
in
Dropout Voltage
V
in
– V
–
0.5
0.7
V
O
I
O
= 40 mA
Quiescent Current
30HT1 Suffix (V = 5.0 V)
I
µA
CC
–
–
–
–
1.1
1.1
1.2
1.3
3.3
3.3
3.6
3.9
in
33HT1 Suffix (V = 5.0 V)
in
40HT1 Suffix (V = 6.0 V)
in
50HT1 Suffix (V = 7.0 V)
in
Output Voltage Temperature Coefficient
T
C
–
±100
–
ppm/°C
NOTE: 1. Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
DEFINITIONS
Dropout Voltage – The input/output voltage differential at
which the regulator output no longer maintains regulation
against further reductions in input voltage. Measured when
the output drops 100 mV below its nominal value (which is
measured at 1.0 V differential), dropout voltage is affected
by junction temperature, load current and minimum input
supply requirements.
such that average chip temperature is not significantly
affected.
Load Regulation – The change in output voltage for a
change in load current at constant chip temperature.
Maximum Power Dissipation – The maximum total device
dissipation for which the regulator will operate within
specifications.
Line Regulation – The change in output voltage for a
change in input voltage. The measurement is made under
conditions of low dissipation or by using pulse techniques
Quiescent Bias Current – Current which is used to operate
the regulator chip and is not delivered to the load.
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2
MC78FC00 Series
5.1
5.0
4.9
4.8
4.7
0
0.8
MC78FC00 Series
T = 25°C
A
I
= 50 mA
O
0.6
0.4
0.2
T = -30°C
A
T = 80°C
A
T = 25°C
A
I
= 10 mA
O
MC78FC50HT1
50
I
O
= 1.0 mA
1.0
0
0
100
150
200
250
0
2.0
3.0
V , SET OUTPUT VOLTAGE (V)
reg
4.0
5.0
6.0
7.0
I , OUTPUT CURRENT (mA)
O
Figure 1. Output Voltage versus Output Current
Figure 2. Dropout versus Set Output Voltage
1.5
1.3
1.1
0.9
0.7
0.5
0.8
0.6
MC78FC50HT1
MC78FC50HT1
T = 80°C
A
0.4
0.2
0
T = 25°C
A
T = -30°C
A
-40
-20
0
20
40
60
80
100
120
0
20
40
60
80
100
T , AMBIENT TEMPERATURE (°C)
A
I , OUTPUT CURRENT (mA)
O
Figure 3. Quiescent Current versus Temperature
Figure 4. Dropout Voltage versus Output Current
9.0
8.0
7.0
6.0
5.0
Input Voltage
Output Voltage
4.0
3.0
2.0
1.0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
t, TIME (ms)
Figure 5. Line Transient Response
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3
MC78FC00 Series
APPLICATIONS INFORMATION
Introduction
2
3
The MC78FC00 micropower voltage regulators are
specifically designed with internal current limiting and low
quiescent current making them ideal for battery powered
applications. An input bypass capacitor is recommended if
the regulator is located an appreciable distance (≥ 4 inches)
from the input voltage source. These regulators require
0.1 µF capacitance between the output terminal and ground
for stability. Most types of aluminum, tantalum or multilayer
ceramic will perform adequately. Solid tantalums or other
appropriate capacitors are recommended for operation
below 25°C. The bypass capacitors should be mounted with
the shortest possible leads or track lengths directly across the
regulator input and output terminals.
V
V
O
in
MC78FC00
0.1 µF
0.1 µF
1
Gnd
Gnd
Figure 6. Typical Application
MJD32C
With economical electrolytic capacitors, cold temperature
operation can pose a serious stability problem. As the
electrolyte freezes, around –30°C, the capacitance will
decrease and the equivalent series resistance (ESR) will
increase drastically, causing the circuit to oscillate. Quality
electrolytic capacitors with extended temperature ranges of
–40° to +85°C are readily available. Solid tantalum
capacitors may be the better choice if small size is a
requirement. However, a maximum ESR limit of 3.0 Ω must
be observed over temperature to maintain stability.
.033 µF
2
3
V
V
O
in
MC78FC00
100
1
10 µF
0.1 µF
0.1 µF
Gnd
Gnd
Figure 6 is a typical circuit application. Figure 7 is a
current boost circuit which can deliver more than 600 mA.
The circuit has no current limiting and the external transistor
must be rated for the expected power dissipation.
Figure 7. Current Boost Circuit
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MC78FC00 Series
PACKAGE DIMENSIONS
H SUFFIX
PLASTIC PACKAGE
CASE 1213–01
(SOT–89)
ISSUE O
NOTES:
A
D
A2
1. DIMENSIONS ARE IN MILLIMETERS.
2. INTERPRET DIMENSIONS AND TOLERANCING
PER ASME Y14.5M, 1994.
C
B
D1
3. DATUM C IS A SEATING PLANE.
MILLIMETERS
DIM MIN
MAX
1.60
0.57
0.52
0.50
4.60
1.70
4.25
2.60
E1
E
A2
B
1.40
0.37
0.32
0.30
4.40
1.50
---
B1
C
L1
D
B
D1
E
C
M
S
S
0.10
C B
C B
A
E1
e
2.40
1.50 BSC
3.00 BSC
0.80 ---
B1 2X
e1
L1
e
M
S
S
0.10
A
e1
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5
MC78FC00 Series
Notes
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6
MC78FC00 Series
Notes
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MC78FC00 Series
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are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes
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MC78FC00/D
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